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wifi-scripts: fix WiFi 6E discovery for 6GHz 320MHz operation
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WiFi 6E (802.11ax) clients cannot discover 6GHz APs operating at
320MHz because the HE Operation element contains uninitialized
center frequency values.

For EHT320 mode, the code sets eht_oper_centr_freq_seg0_idx but not
the corresponding HE values. Later, the HE values are copied from
VHT values, but VHT is not used on 6GHz, leaving he_oper_chwidth
and he_oper_centr_freq_seg0_idx at 0. This causes WiFi 6E clients
to see incorrect channel width information, making the AP invisible
to them during scanning.

Fix this by:
1. Setting he_oper_chwidth to 3 (160MHz) for EHT320 mode
2. Computing he_oper_centr_freq_seg0_idx based on the 160MHz segment
   that contains the primary channel
3. Preserving these pre-set values instead of overwriting them with
   uninitialized VHT values

WiFi 7 clients continue to see 320MHz operation via the EHT Operation
element, while WiFi 6E clients can now discover and connect at 160MHz.

Signed-off-by: Ryan Chen <rchen14b@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/21588
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Ryan Chen 2026-01-17 20:51:14 -06:00 • committed by Robert Marko
parent b300a9e63d
commit a8bdb1e6d6
1 changed files with 20 additions and 2 deletions
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22
package/network/config/wifi-scripts/files-ucode/usr/share/ucode/wifi/hostapd.uc
View file

@ -283,6 +283,17 @@ function device_htmode_append(config) {
}
config.op_class = 137;
config.eht_oper_chwidth = 7;
/*
* Set HE operation values for 160MHz backward compatibility
* with WiFi 6E clients. Pick the 160MHz half that contains
* the primary channel.
*/
config.he_oper_chwidth = 3;
if (config.channel < config.eht_oper_centr_freq_seg0_idx)
config.he_oper_centr_freq_seg0_idx = config.eht_oper_centr_freq_seg0_idx - 16;
else
config.he_oper_centr_freq_seg0_idx = config.eht_oper_centr_freq_seg0_idx + 16;
break;
case 'HE40':
@ -383,8 +394,15 @@ function device_htmode_append(config) {
config.ieee80211ax = true;
if (config.hw_mode == 'a') {
config.he_oper_chwidth = config.vht_oper_chwidth;
config.he_oper_centr_freq_seg0_idx = config.vht_oper_centr_freq_seg0_idx;
/*
* Only set HE values from VHT if not already set.
* For 6GHz 320MHz, these are pre-set for 160MHz backward
* compatibility with WiFi 6E clients.
*/
if (!config.he_oper_chwidth)
config.he_oper_chwidth = config.vht_oper_chwidth;
if (!config.he_oper_centr_freq_seg0_idx)
config.he_oper_centr_freq_seg0_idx = config.vht_oper_centr_freq_seg0_idx;
}
if (config.band == "6g") {